When you said data line, I was not thinking of a set of labels in a line,
but rather of a line showing a target.

Compute the difference in the worksheet, then use one of these utilities to
add these values to one of the series as data labels:

   Rob Bovey's Chart Labeler, http://appspro.com
   John Walkenbach's Chart Tools, http://j-walk.com

Or add an invisible line chart series (no line, no markers) to the chart,
using a dummy date to position the points where you want them, and hang the
labels on this series.

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
_______